Phrases over-represented in these complaints compared with the same component on every other vehicle. Counts are complaints containing the phrase.
Engine 127 complaints
crankcase
43
34%
ventilation
33
26%
crankcase ventilation
30
24%
ventilation valve
13
10%
vent
11
9%
wrist
10
8%
Fuel/Propulsion System 66 complaints
smell
32
49%
cabin
18
28%
crankcase
13
20%
ventilation
12
19%
crankcase ventilation
11
17%
hose
10
16%
Unknown Or Other 63 complaints
sunroof
14
23%
valve
11
18%
crankcase
10
16%
When it breaks
35% of reported failures happened before 30,000 miles (median 49,000 miles, from 164 complaints that recorded one).
No clear early or late pattern.
What NHTSA did
3 investigations covering this model year, 1 of which list a recall campaign.
C300 Wrist-pin allegation
What owners and forums say
Not built yet. This panel is meant to carry community sentiment beside the filed-complaint data, so the two can be compared. Showing something weaker here would defeat its purpose.
Limits of this figure. It counts safety complaints filed with the federal government, which is a floor on failures and not a census: problems that only cost money are under-reported. Complaint rates also reflect how likely a brand’s owners are to file, which cannot be separated from how often the car fails. Sales are calendar-year and the denominator for this nameplate is automated checks only, not verified against an external source.